Dragon Board
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Can someone tell me if Dragon Board is imported from China. I heard on thenews today that sheetrock made in China isn't any good and that it turns black and even ruins the electrical wiring in the walls.
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In terms of chemical issues, Hardi-Backer is usually recommended
(harder to cut though, and I'm not sure it's as odor-free as it used to be). On Fri, Apr 2, 2010 at 5:05 PM, StephenK <[hidden email]> wrote: > > > Can someone tell me if Dragon Board is imported from China. I heard on the > news today that sheetrock made in China isn't any good and that it turns > black and even ruins the electrical wiring in the walls. > > > [Non-text portions of this message have been removed] |
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In reply to this post by skolyer
I researched this quite a bit this past fall. Dragon Board or MgO board, another name for it, is made in China. The overseeing of the manufacturing of this board is highly supervised so that no toxic ingredients go into it. It is certified green I believe. HOWEVER, What my concern is the fumigation of the containers that is comes in from over seas is not sealed. They fumigate the bottom pallets but the board is not completely sealed away from that fumigation. That is why we did not go with it for our travel trailer.
Yes, there was a major batch of drywall - gypsum board that came from China during the shortage of drywall after Hurricane Katrina hit. This drywall was not properly supervised and yes they put whatever they wanted to in it. If I can remember right in my brain fogged ways that this drywall was filled with sulfur and as it off gassed it ate even the electrical wiring and made the houses that were built with it very very toxic to live in. http://www2.tbo.com/content/2010/apr/02/government-gut-home-get-rid-chinese-drywall/news-metro/ Kris If you want the names of the companies that sell Dragonboard/MgO board here in the US I can get you that info. ________________________________ From: StephenK <[hidden email]> To: [hidden email] Sent: Fri, April 2, 2010 6:05:47 PM Subject: [eSens] Dragon Board Can someone tell me if Dragon Board is imported from China. I heard on the news today that sheetrock made in China isn't any good and that it turns black and even ruins the electrical wiring in the walls. ------------------------------------ Yahoo! Groups Links [Non-text portions of this message have been removed] |
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If you can pick out sheets from the middle of the stack they might not be as
bad. But also let your nose be the guide and try to let them air out a few days at least before use. I think Jim Beal gave us some numbers for attenuation. I don't remember them but it's probably like a factor of 2 or 4 reduction. That sounds good, but if you want the effects to go away you may need 1000 fold or even million-fold reduction. That can be achieved with metal shielding in principle. In practice 100 fold is not too hard to achieve in a house using metal foil with no gaps. On Fri, Apr 2, 2010 at 9:35 PM, K <[hidden email]> wrote: > > > I researched this quite a bit this past fall. Dragon Board or MgO board, > another name for it, is made in China. The overseeing of the manufacturing > of this board is highly supervised so that no toxic ingredients go into it. > It is certified green I believe. HOWEVER, What my concern is the fumigation > of the containers that is comes in from over seas is not sealed. They > fumigate the bottom pallets but the board is not completely sealed away from > that fumigation. That is why we did not go with it for our travel trailer. > > Yes, there was a major batch of drywall - gypsum board that came from China > during the shortage of drywall after Hurricane Katrina hit. This drywall was > not properly supervised and yes they put whatever they wanted to in it. If I > can remember right in my brain fogged ways that this drywall was filled with > sulfur and as it off gassed it ate even the electrical wiring and made the > houses that were built with it very very toxic to live in. > > > http://www2.tbo.com/content/2010/apr/02/government-gut-home-get-rid-chinese-drywall/news-metro/ > > Kris > If you want the names of the companies that sell Dragonboard/MgO board here > in the US I can get you that info. > > ________________________________ > From: StephenK <[hidden email] <skolyer%40vaughns.com>> > To: [hidden email] <eSens%40yahoogroups.com> > Sent: Fri, April 2, 2010 6:05:47 PM > Subject: [eSens] Dragon Board > > > Can someone tell me if Dragon Board is imported from China. I heard on the > news today that sheetrock made in China isn't any good and that it turns > black and even ruins the electrical wiring in the walls. > > ------------------------------------ > > Yahoo! Groups Links > > [Non-text portions of this message have been removed] > > > [Non-text portions of this message have been removed] |
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I couldn't pick out the sheets. They're in Florida and Texas. Not in South Dakota. :( I didn't want to risk that.
Wasn't going to use the Dragonboard for EHS protection anyway. need something that will shield way better than the Dragonboard. Kris ________________________________ From: Bill Bruno <[hidden email]> To: [hidden email] Sent: Fri, April 2, 2010 11:00:13 PM Subject: Re: [eSens] Dragon Board If you can pick out sheets from the middle of the stack they might not be as bad. But also let your nose be the guide and try to let them air out a few days at least before use. I think Jim Beal gave us some numbers for attenuation. I don't remember them but it's probably like a factor of 2 or 4 reduction. That sounds good, but if you want the effects to go away you may need 1000 fold or even million-fold reduction. That can be achieved with metal shielding in principle. In practice 100 fold is not too hard to achieve in a house using metal foil with no gaps. On Fri, Apr 2, 2010 at 9:35 PM, K <[hidden email]> wrote: > > > I researched this quite a bit this past fall. Dragon Board or MgO board, > another name for it, is made in China. The overseeing of the manufacturing > of this board is highly supervised so that no toxic ingredients go into it. > It is certified green I believe. HOWEVER, What my concern is the fumigation > of the containers that is comes in from over seas is not sealed. They > fumigate the bottom pallets but the board is not completely sealed away from > that fumigation. That is why we did not go with it for our travel trailer. > > Yes, there was a major batch of drywall - gypsum board that came from China > during the shortage of drywall after Hurricane Katrina hit. This drywall was > not properly supervised and yes they put whatever they wanted to in it. If I > can remember right in my brain fogged ways that this drywall was filled with > sulfur and as it off gassed it ate even the electrical wiring and made the > houses that were built with it very very toxic to live in. > > > http://www2.tbo.com/content/2010/apr/02/government-gut-home-get-rid-chinese-drywall/news-metro/ > > Kris > If you want the names of the companies that sell Dragonboard/MgO board here > in the US I can get you that info. > > ________________________________ > From: StephenK <[hidden email] <skolyer%40vaughns.com>> > To: [hidden email] <eSens%40yahoogroups.com> > Sent: Fri, April 2, 2010 6:05:47 PM > Subject: [eSens] Dragon Board > > > Can someone tell me if Dragon Board is imported from China. I heard on the > news today that sheetrock made in China isn't any good and that it turns > black and even ruins the electrical wiring in the walls. > > ------------------------------------ > > Yahoo! Groups Links > > [Non-text portions of this message have been removed] > > > [Non-text portions of this message have been removed] ------------------------------------ Yahoo! Groups Links [Non-text portions of this message have been removed] |
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In reply to this post by skolyer
I recently put up some hardibacker in the bathroom. The materials were so cheap in my mobile home. It feels like a regular house now. I am learning how to do tiling and used the hardbacker to put the tile on. But I never stop remodeling and will be re-remodeling another room when I finish the bathroom. I'm wondering what you decided to use to shield for the eletrical emissions in the atmosphere? I'm thinking if I get good enough at tiling I may use hardibacker and tile for the walls in another room. But I'm making the walls thicker and want to put shielding materials on the inside of the walls instead of on the outside the way it is now in some rooms.
[Non-text portions of this message have been removed] |
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I think ideally you want a continuous, flat, foil-type layer
with no metal penetrations (glue it up... if you must staple, use short staples, or use screws and glue then take the screws out again), then a couple inches inside of that an absorbing type material, like the "RF absorber" lessEMF sells. If for any reason you have kiloHz frequency fields you need to block (like a dirty power source) I would use two conducting layers, separated by 2 inches or more (but not too close to the source). On Sat, Apr 3, 2010 at 7:39 AM, <[hidden email]> wrote: > > > I recently put up some hardibacker in the bathroom. The materials were so > cheap in my mobile home. It feels like a regular house now. I am learning > how to do tiling and used the hardbacker to put the tile on. But I never > stop remodeling and will be re-remodeling another room when I finish the > bathroom. I'm wondering what you decided to use to shield for the eletrical > emissions in the atmosphere? I'm thinking if I get good enough at tiling I > may use hardibacker and tile for the walls in another room. But I'm making > the walls thicker and want to put shielding materials on the inside of the > walls instead of on the outside the way it is now in some rooms. > > [Non-text portions of this message have been removed] > > > [Non-text portions of this message have been removed] |
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